666066015005 has 4 divisors (see below), whose sum is σ = 799279218012. Its totient is φ = 532852812000.

The previous prime is 666066014947. The next prime is 666066015023. The reversal of 666066015005 is 500510660666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199191723481 + 466874291524 = 446309^2 + 683282^2 .

It is not a de Polignac number, because 666066015005 - 2¹⁴ = 666065998621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66606601496 + ... + 66606601505.

It is an arithmetic number, because the mean of its divisors is an integer number (199819804503).

Almost surely, 2^666066015005 is an apocalyptic number.

It is an amenable number.

666066015005 is a deficient number, since it is larger than the sum of its proper divisors (133213203007).

666066015005 is a wasteful number, since it uses less digits than its factorization.

666066015005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133213203006.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 666066015005 in words is "six hundred sixty-six billion, sixty-six million, fifteen thousand, five".